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Polyelectrolyte grafted polyvinyl alcohol spinning membrane for oil-water emulsion separation as well as preparation method and application of polyelectrolyte grafted polyvinyl alcohol spinning membrane

A polyvinyl alcohol spinning and polyelectrolyte technology, which is applied in separation methods, liquid separation, immiscible liquid separation, etc. And other issues

Active Publication Date: 2022-03-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, neither of them can perform demulsification operation on oil-water emulsion, and cannot achieve complete separation, which seriously affects the further application of the separation liquid; and the pre-demulsification operation before separation is cumbersome, and the introduced demulsifier will also affect the surface of water or oil nature, not conducive to recycling

Method used

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  • Polyelectrolyte grafted polyvinyl alcohol spinning membrane for oil-water emulsion separation as well as preparation method and application of polyelectrolyte grafted polyvinyl alcohol spinning membrane
  • Polyelectrolyte grafted polyvinyl alcohol spinning membrane for oil-water emulsion separation as well as preparation method and application of polyelectrolyte grafted polyvinyl alcohol spinning membrane
  • Polyelectrolyte grafted polyvinyl alcohol spinning membrane for oil-water emulsion separation as well as preparation method and application of polyelectrolyte grafted polyvinyl alcohol spinning membrane

Examples

Experimental program
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Effect test

preparation example Construction

[0030] A kind of preparation method of the polyelectrolyte graft polyvinyl alcohol spinning membrane that the present invention is used for oil-water emulsion separation comprises the following steps:

[0031] Step 1: Polyvinyl alcohol (PVA) and sodium lauryl sulfate are dissolved in water together to form a colorless and transparent solution;

[0032] Preferably, the concentration of polyvinyl alcohol is 50 mg / ml-150 mg / ml, and the concentration of sodium lauryl sulfate is 5 g / L-15 g / L.

[0033] Step 2: Use an electrospinning apparatus to perform electrospinning operation on the colorless transparent solution formed in step 1 at a certain spinning injection speed, use a drum wrapped in aluminum foil at the receiving end, and spin for a certain period of time to form a Polyvinyl alcohol spun film of aluminum foil;

[0034] Preferably, the spinning bolus speed is 40 mg / h-60 mg / h based on the mass of polyvinyl alcohol, and the spinning time is 2 h-4 h.

[0035] Step 3: Dissolv...

Embodiment 1

[0042] A preparation method for a polyelectrolyte grafted polyvinyl alcohol spinning membrane for oil-water emulsion separation, comprising the following steps:

[0043] Step 1: Dissolving polyvinyl alcohol and sodium lauryl sulfate in water together to form a colorless and transparent solution;

[0044] Wherein, the concentration of polyvinyl alcohol is 100 mg / ml, and the concentration of sodium lauryl sulfate is 7 g / L.

[0045] Step 2: Use an electrospinning apparatus to perform electrospinning operation on the solution formed in step 1. The spinning bolus speed is 60 mg / h based on the mass of polyvinyl alcohol. The receiving end uses a drum wrapped in aluminum foil, and the spinning operation is 3 hours. Form a polyvinyl alcohol spun film with an aluminum foil, such as figure 1 a, as shown in 1b;

[0046] Step 3: Dissolve glutaraldehyde in acetone, add concentrated hydrochloric acid, immerse the polyvinyl alcohol spinning film with aluminum foil in it for 5 minutes, the p...

Embodiment 2

[0054] A preparation method for a polyelectrolyte grafted polyvinyl alcohol spinning membrane for oil-water emulsion separation, comprising the following steps:

[0055] Step 1: Dissolving polyvinyl alcohol and sodium lauryl sulfate in water together to form a colorless and transparent solution;

[0056] Wherein, the concentration of polyvinyl alcohol is 120 mg / ml, and the concentration of sodium lauryl sulfate is 5 g / L.

[0057] Step 2: Use an electrospinning apparatus to perform electrospinning operation on the solution formed in step 1. The spinning bolus speed is 55 mg / h based on the mass of polyvinyl alcohol. The receiving end uses a drum wrapped in aluminum foil, and the spinning operation is 4 hours. Forming polyvinyl alcohol spun film with aluminum foil;

[0058] Step 3: Dissolve glutaraldehyde in acetone, and add concentrated hydrochloric acid. Immerse the polyvinyl alcohol spun film with aluminum foil in it for 15 minutes, the polyvinyl alcohol spun film falls off ...

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Abstract

The invention discloses a polyelectrolyte grafted polyvinyl alcohol spinning membrane for oil-water emulsion separation and a preparation method and application thereof.The preparation method comprises the steps that a polymer is dissolved in dimethyl sulfoxide, hexamethylene diisocyanate is added, a third solution system is formed, a cross-linked polyvinyl alcohol spinning membrane is immersed in the third solution system, and the polyelectrolyte grafted polyvinyl alcohol spinning membrane is obtained; treating at a first predetermined temperature for a third predetermined time to obtain a grafted polyvinyl alcohol spinning membrane, and extracting, cleaning and drying the grafted polyvinyl alcohol spinning membrane by using hot dimethyl sulfoxide after the treatment is completed to obtain the polyelectrolyte grafted polyvinyl alcohol spinning membrane. According to the method, emulsion demulsification and oil-water separation operation are combined, an oil-water mixture and oil-water emulsion can be efficiently separated at a high speed, pollution is not likely to happen, the continuous operation capacity is achieved, the emulsion does not need to be demulsified in advance, other substances are not introduced in the collaborative demulsification process, and further recycling and application of separated oil and water are facilitated.

Description

technical field [0001] The invention relates to the technical field of oil-water separation membrane materials, in particular to a polyelectrolyte grafted polyvinyl alcohol spinning membrane used for oil-water emulsion separation, its preparation method and application. Background technique [0002] Frequent outbreaks of oil spills and the increasingly serious discharge of oily wastewater from production and life are causing more and more serious harm to the ecological environment, the survival of species, and the healthy development of human beings. Oil-water separation has become the main means to solve this kind of pollution. Traditional separation methods, such as gravity, centrifugation, filtration, flotation, etc. have problems such as low separation efficiency, complicated operation, high cost, easy to produce secondary pollution, and are not suitable for specific occasions. [0003] Membrane separation technology can overcome the above defects. According to surface ...

Claims

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Application Information

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IPC IPC(8): D06M13/123D06M15/564B01D17/04B01D17/02D06M101/24
CPCD06M13/123D06M15/564B01D17/04B01D17/085D06M2101/24
Inventor 梁军艳陈照宇赵凌儒和玲
Owner XI AN JIAOTONG UNIV
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